body{
    background-color: white;
}
.first1{
    width: 1920px;
    height: 200px;
    margin: 0 auto;
}
.first3{
    width: 1200px;
    height: 30px;
    margin: 0px auto;
}
.first3\.1{
    width:120px;
    height: 30px;
    margin: 0px 50px;
    float: left;
}
.first3\.2{
    width:120px;
    height: 30px;
    margin: 0px 50px;
    float: left;
}
.first3\.3{
    width:120px;
    height: 30px;
    margin: 0px 50px;
    float: left;
}
.first3\.4{
    width:120px;
    height: 30px;
    margin: 0px 50px;
    float: left;
}
.first3\.5{
    width:120px;
    height: 30px;
    margin: 0px 50px;
    float: left;
}
.first4{
    width: 1920px;
    height: 1000px;
    margin: auto;
}
.first5\.1 {
    width: 1920px;
    height: 260px;
    margin: auto;
}

.first5\.2 {
    width: 1920px;
    height: 260px;
    margin: auto;
}
.first5\.3 {
    width: 1920px;
    height: 260px;
    margin: auto;
}
.first5\.4 {
    width: 1920px;
    height: 260px;
    margin: auto;
}
.first6\.1{
    width: 600px;
    height: 200px;
    float: left;
    font-family: 楷体;
    font-size: 15px;
}
.first6\.2{
    width: 600px;
    height: 200px;
    float: right;
    font-family: 楷体;
    font-size: 15px;
}
.first6\.3{
    width: 200px;
    height: 200px;
    display: inline-block;
    margin: auto;
}
.first7{
    width: 1200px;
    height: 200px;
    margin: 20px auto;
    font-size: 20px;
}
.foot{
    width: 1920px;
    height: 200px;
    margin: auto;
}
.login1{
    width: 600px;
    height: 600px;
    margin: auto;
}
.user{
    width: 600px;
    height: 200px;
    margin: auto;
}
.password{
    width: 600px;
    height: 200px;
    margin: auto;
}
.anniu{
    width: 600px;
    height: 200px;
    margin: auto;
}
.header2{
    align-self: center;
}
.aa{
    width:1200px;
    height: 600px;
    margin: auto;
}
.aa1{
    width: 800px;
    height: 600px;
    display: inline-block;
    margin: auto;
}
.aa2{
    width: 400px;
    height: 600px;
    margin: auto;
    float: right;
}